Steven Kassels, MD
NPI 1154458735 · Internal Medicine Physician · Westfield, MA
Steven Kassels, MD is a Internal Medicine Physician provider in Westfield, MA (NPI 1154458735).
Provider details
- NPI number
- 1154458735
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 77240 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-28
- Last updated
- 2025-09-11
Frequently asked questions
- What is Steven Kassels's NPI number?
- Steven Kassels's National Provider Identifier (NPI) is 1154458735, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Kassels's specialty?
- Steven Kassels is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Kassels located?
- Steven Kassels's practice location on file with NPPES is 125 N Elm St, Westfield, MA 01085-1643.
- What is Steven Kassels's phone number?
- The practice phone number listed in the NPPES registry for Steven Kassels is (413) 568-6600.
- Is Steven Kassels's NPI active?
- Yes — Steven Kassels's NPI (1154458735) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.